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14-10-2014 #1
Last Activity: 1 Day Ago
I can see that your going to be another valuable member of this forum.
..Clive
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14-10-2014 #2
Last Activity: 28-05-2023
Most of the thinking seems based on 20ma current through the LED. It might be worth experimenting with resistor values that give about 5ma and see if the brightness of the LED is acceptable. So then a single series resistor would dissipate less power and could be a cheaper component.
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Just had a play on the breadboard and LED in series with 4 x 4.7k ohm (18.8k) still gives a reasonable light. I tried it on 30v 15v and 5v (5v is probably too dim). I used a standard 3mm red in a clear capsule LED.Last edited by cropwell; 14-10-2014 at 10:29 PM.
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